script for parsing files for #if and #ifdef's

by Lawrence R. Do » Wed, 24 Jun 1992 07:48:10

Hello,

I am looking for a script to parse a collection of source code files for the
cpp directives "#if," "#ifdef," "#ifndef," and "#elif" and then produce a one
line entries like

foobar.c:#if SUN CRAY IBM
foobar.c:#ifdef SPECIFIC

indicating that file foobar.c depends on the symbols "SUN," "CRAY," and "IBM"
as well as "SPECIFIC." This would be analogous to what makedepend of X11 does
for "#include" directives. I have a script that uses grep but I don't know
enough about awk to process things the way I want. Is there such a script
floating around?

Thanks in advance.

Larry

--
Larry

Top

1. parsing a 'flexible' text file with SED: i'm in over my head ....

hi all,

i have a massive text-data file that i need to extract key data from,
and format the output.

i initially tried a combination of MS Word & Excel ... massive failure
there!

because of the input file's not-quite-strict format, my best guess is
that a "regular expression" script using a text-parser like SED is the
way to go.

i'm new to SED, and have read through the tutorials i could find, as
well as some of the posts here. one line at a time, i'm pretty much
OK, but processing this file -- well, i'm in over my head.

can anyone out there help with a script that'll do the job, assuming
that SED is even the right tool?

here's the situation:

###############
# INPUT FILE

the data is a simple text file with the following repeating block of
information:
note:
(a) "separator_text" is the same everytime
(b) the NUMBER of data elements under the 2nd variable (varName_2)
in each block varies
-- e.g., 3 elements under the 1st instance varName_2 & 2
elements under the 2nd instance
the

separator_text

(random_text & CRs)

varName_1
var_data_1

(random_text & CRs)

varName_2
var_data_2a
var_data_2b
var_data_2c

(random_text & CRs)

varName_3
var_data_3

(random_text & CRs)

separator_text

(random_text & CRs)

varName_1
var_data_4

(random_text & CRs)

varName_2
var_data_5a
var_data_5b

(random_text & CRs)

varName_3
var_data_6

(random_text & CRs)

separator_text

###############
# OUTPUT FILE

the goal is to extract all blocks of text data from the INPUT FILE and
format the output in a tab-delineated table as follows.

note: i need to create a complete record for EACH
multiple_variable_value ...

e.g., the output for the two blocks above would look like:

varName1 (tab) varName2 (tab) varName3
var_data_1 (tab) var_data_2a (tab) var_data_3
var_data_1 (tab) var_data_2b (tab) var_data_3
var_data_1 (tab) var_data_2c (tab) var_data_3
var_data_4 (tab) var_data_5a (tab) var_data_6
var_data_4 (tab) var_data_5b (tab) var_data_6

This looked really simple at the start ... but I've simply managed to
generate random garbage.

I'd very much appreciate anyone that could suggest a complete script
that would do the job!

Thanks,

Richard

2. testing if running shell script in {t}csh

3. how to parse 'variable=value' format from file

4. Any problem with Internet s/w on Sol 2.4

5. SED: parsing a 'flexible' text file ... in over my head!

6. FAQ: Sun Computer Administration Frequently Asked Questions

7. Linux program can't find ifs lib file -- help

8. Getting Assembly Listing from cc

9. isapnp can't parse pnpdump's config file-- why?